Development of a Gas Chromatography-Mass Spectrometry Method for the Quantification of Glucaric Acid Derivatives in Beverage Substrates

Table 2

Slopes and calibration parameters of calibration curves for GL and DGuA.

Sample/replicate	GL				DGuA
	Slope	𝑦-intercept	𝑅^2	Standard range (ppm)	Slope	𝑦-intercept	𝑅^2	Standard range (ppm)
1/1	364463	6770.7	0.997	0.11–1.10	20566	2357.0	0.97	0.31–3.05
1/2	348155	7874.9	0.995	0.14–1.10	19388	2502	0.98	0.41–3.05
2/1	199719	1910.9	0.998	0.13–1.10	8254.50	3002.0	0.996	0.36–3.08
2/2	201892	1174.1	0.998	0.13–1.06	8383.1	2363.9	0.995	0.36–2.92
3/1	273943	861850.0	0.995	0.57–4.41	2432	93900	0.998	1.58–12.20
3/2	288786	909809	0.999	0.58–4.31	2558	99701	0.992	1.60–11.94
4/1	117727	52707	0.999	0.58–4.47	8384.40	34811	0.999	1.59–12.36
4/2	119471	51417	0.999	0.57–4.46	7805.6	36027	0.999	1.58–12.33